Train Smarter.
Race Better.
Data-driven tools to dial in your nutrition, pacing, and race day strategy.
Even Splits Lab is where endurance training meets real numbers. Our articles break down how to train, fuel, and race smarter, with simple calculators to dial in your pacing, nutrition, sweat rate, and heart rate zones. Built for runners, cyclists, and triathletes who want data they can actually use.
The Lab Tools
Fuel Strategy
Running a half marathon? Most athletes need 60–90g of carbs per hour. Find your exact number in 2 minutes.
Plan FuelSweat Rate
Lose more than 1L of fluid per hour without knowing it? Most athletes do. Find your hourly sweat rate in 2 minutes.
Run TestPacing Strategy
Want to run a sub-2:00 half? You need to hold 5:41/km. Enter your goal time and find the pace you actually need to hit.
Find Your PaceHR Zone Finder
Training in Zone 2 but actually running in Zone 3? It happens more than you’d think. Get your personal zones in 2 minutes.
Find Your ZonesLatest From the Lab
Why Is My Heart Rate So High on Easy Runs?
You lace up for an easy run. Comfortable pace, normal effort. Then you glance at your watch and your heart rate is sitting at 168 bpm. That is not a Zone 2 number. You slow down, it drops a bit, but the moment you hit any kind of incline or mild headwind it creeps straight […]
Are Carbon Plate Shoes Worth It If You’re Not Fast?
Carbon plate running shoes have taken over race start lines. You see them on elite runners, age groupers, and, increasingly, people at their first 5K. The technology is real: the stiff plate and bouncy foam work together to return energy and keep your turnover high. The question is whether any of that translates into something […]
Triathlon Terms for Beginners: 40+ Words You Should Actually Know
You sign up for your first triathlon, feeling pretty good about it, and then someone in the group chat starts talking about their T1, whether the swim is wetsuit-legal, and how they bonked on the run. Suddenly it sounds like a different sport with its own secret language. It isn’t. Most of the jargon is […]